feat(settings): surface the console color toggles as checkboxes

Add "Color accents" and "Text colors" checkboxes under the effects section
(both layout variants) so the console output display prefs are discoverable
outside the console toolbar. They mirror the toolbar buttons — bound live to
the ConsoleTab statics and written through to settings on change.

Unlike scanline/theme-effects they carry no GPU cost, so a small helper closes
the effects row's BeginDisabled(low_spec), draws them on their own always-
enabled row, and reopens it for the acrylic sliders (net-balanced). Adds
console_accents / console_text_colors labels + 8 translations; the tooltips
reuse the existing toggle keys.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

res/lang/zh.json

@@ -180,6 +180,7 @@
     "connected_peers": "已连接节点",
     "connecting": "连接中...",
     "console": "控制台",
+    "console_accents": "颜色强调",
     "console_app": "应用",
     "console_auto_scroll": "自动滚动",
     "console_available_commands": "可用命令：",
@@ -240,6 +241,7 @@
     "console_status_stopping": "停止中",
     "console_status_unknown": "未知",
     "console_tab_completion": "Tab 补全",
+    "console_text_colors": "文本颜色",
     "console_toggle_accents": "切换行颜色强调",
     "console_toggle_text_color": "切换行文本颜色",
     "console_type_help": "输入 'help' 查看可用命令",